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Old 11-28-2012, 09:25 PM   #11 (permalink)
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I had a 2010ultra stock 96 and rinehart slipons and stage 1air cleaner. I got 45-50 all the time. Sounds like to me the factory efi is running to rich since you took out the o2 sensors. The pcv is just a piggy back system that tricks the stock efi into running what the pcv tells it to. The map on the pcv is running on top of the factory map. If your efi doesnt receive a signal from the o2sensors then its probably runking rich and then the pcv tells it to run even richer. Without the o2 sensors you are pouring fuel down the exhaust.
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Old 11-28-2012, 10:05 PM   #12 (permalink)
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Question: I know that the recommendation is 91 - 93 octane fuel which I use (sucks paying 40c more a gallon) but would this make a difference if you didn't have premium and then got the bike dynoed?
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Old 11-29-2012, 07:39 AM   #13 (permalink)
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Quote:
Originally Posted by 2010hdultra View Post
I had a 2010ultra stock 96 and rinehart slipons and stage 1air cleaner. I got 45-50 all the time. Sounds like to me the factory efi is running to rich since you took out the o2 sensors. The pcv is just a piggy back system that tricks the stock efi into running what the pcv tells it to. The map on the pcv is running on top of the factory map. If your efi doesnt receive a signal from the o2sensors then its probably runking rich and then the pcv tells it to run even richer. Without the o2 sensors you are pouring fuel down the exhaust.
not quite how it works. Bike runs on PCV map, 02 sensors are eliminated with the PCV. The mapping in the PCV needs to be adjusted.
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Old 11-29-2012, 08:49 AM   #14 (permalink)
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Quote:
Originally Posted by Knash View Post
Question: I know that the recommendation is 91 - 93 octane fuel which I use (sucks paying 40c more a gallon) but would this make a difference if you didn't have premium and then got the bike dynoed?
Octane is a rating of the fuels anti-knock properties. You can't Dyno out the fact that your bike has a high compression engine and needs the higher octane fuel.

Does it need premium instead of maybe the mid grade stuff? That is a whole other question.
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Old 11-29-2012, 09:34 AM   #15 (permalink)
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My 11sg has a stg2 103 screamin eagle kit, 255 cam, decatted pipes w/ 4" se slip ons, se ventilator and seprt. I average 40 mpg +/- riding 2 up depending how hard were running and who were riding with.


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